1999-2004 Honda TRX400EX FourTrax Service Manual, Page 238Get this manual

ELECTRIC STARTER From page 17-2

Check the starter relay voltage (page 17-10)
Abnormal

+- Faulty ignition switch

Check the starter relay 17-10)

Blownfuse Faulty engine stop switch Faulty starter switch Loose or poor connector contact Open circuit in wire harness

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